Question

Which of the following changes for man in the course of evolution is probably useless?

(a) development of being erect

(b) development of cranial capacity

(c) loss of tail

(d) development of opposable thumb.

Answer 1

The correct option is c) loss of tail.

Loss of tail is probably the useless modification for the man in the course of evolution. The volume of cranial cavity and size of skull also increased in the sequence to accomodate the large and complex brain. The modern man excels all other animals in intelligence. Erect posture of human beings is due to major modifications in the muscle skeletal system. During the course of evolution of man thumb has been brought opposite to the fingers hence enabling of the hand for better grasping power.